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Method and apparatus to eliminate theft of electronic equipment using existing telephone jack

  • US 7,510,580 B2
  • Filed: 11/21/2003
  • Issued: 03/31/2009
  • Est. Priority Date: 11/21/2002
  • Status: Expired due to Fees
First Claim
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1. An antitheft device for use in portable electronic equipment comprising a microprocessor and a communication module for connection to an external communication network, said microprocessor including a telephone number indicative of the location of said electronic equipment, an output to provide said telephone number to said communication module and a comparator to compare a response from said communication module to a predetermined response and thereby determine whether said equipment is in a desired location;

  • wherein said predetermined response is a busy signal from the external communication network.

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